# Thesaurus

#### **Summary**

The **Thesaurus** function lets you define relationships between search terms, such as synonyms and antonyms. These settings affect how FactFinder assesses the similarity of records in the database.

> Such similarities can only be assigned to individual words: "jeans" can be specified to be similar to "trousers", but cannot be defined as similar to "blue cotton trousers". To work with multi-word terms, [Preprocessor](/docs/discovery/search-term-rules/preprocessor.md) should be used

**Thesaurus** is represented as an individual page tab for **Search term rules** page.

![](/files/GJqIin6b62tBIp6fTL77)

#### **Adding Thesaurus entry**

Thesaurus entries consist of word pairs (**Source word** ![](/files/Ph63z0daepEWYQihI5Tp) and **Target Word** ![](/files/2XF0kf1Bm7Z35I6UtFNL)) that have **Relationship** ![](/files/Ehk1tMw4qBIWvCgJj7rh) to each other to an extent that is defined by a **Direction** ![](/files/UipZ5ADW4CYdVObCmdDS) and similarity **Devaluation** ![](/files/cVfuaDKK4FYgURysSN7J):

Default available **Relationships, Directions** and **Devaluations** are:

* **Synonym** - bidirectional - 0% Devaluation
* **Soft Antonym** - bidirectional - 100% Devaluation
* **Hard Antonym** - bidirectional - Excluded from search result
* **Hard Antonym (uni)** - unidirectional - Excluded from search result
* **Similar**- unidirectional - 5% Devaluation
* **Very similar** - unidirectional - 1% Devaluation
* **Generic term** - unidirectional - 0.1% Devaluation
* **Expert** - lets you manually set up **Direction** and **Devaluation**.

> **Tip:** the direction from a pointless to a useful entry should be unidirectional. If both entries are useful, then choose bidirectional.

After entering **Source word** and T**arget word**, selecting **Relationship**, **Direction** and **Devaluation**, adding optional **Comment** ![](/files/dOZlcoZrhcFshT4JyY3F), new Thesaurus entry can be added by clicking **Add Entry** button ![](/files/afMFqoHYxlD3P4x4s54e).

#### **Managing Thesaurus entries**

All created Thesaurus entries are listed in the grid together with their attributes.

The grid lets you **filter** entries:

* hide/show entries deleted in this transaction ![](/files/Sqx7q5UTXXhUawSHwnqh)
* search for a specific entry ![](/files/TA2cmO6o32bttrwoI2Mj)

The following **operations** are available for transactions in the grid:

* edit ![](/files/tTcq74SDxHc1TbcCPhkS)
* clone to another channel ![](/files/BE54BC6URRrdtVW1CXtk)
* delete ![](/files/vLFbeBNtr8ONFAVVFUOV)
* bulk clone and delete operations are available for multiple selected (by ![](/files/p8k00RPckDSQPHooq4Gh)) entries

> Any creation or change to an entry will mark it as locked ![](/files/g0DM13QsLjGG1HqSA542) and require [saving the transaction](/docs/user-interface/editing-configurations-managing-transactions.md).

**Transliterations setting** can be activated to consider common transliterations for the matching, e.g entry “tür” → “tor” would also be triggered for the input “Tuer”.


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.fact-finder.com/docs/discovery/search-term-rules/thesaurus.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.